Controller-integrated rotating electrical machine

Patent metadata

Field	Value
Publication number	US-9570962-B2
Application number	US-201314086030-A
Country	US
Kind code	B2
Filing date	Nov 21, 2013
Priority date	Aug 26, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

An inverter device is provided with a hollow portion in a center portion of a rotation shaft of a rotating electrical machine. The rotating electrical machine has a first cooling air passage for cooling air generated by a cooling fan to flow in from an outer side in a radial direction of the rotating electrical machine, then to cool a heat sink, and to be discharged through ventilation holes provided to a rear bracket on an outer peripheral side by passing an inner periphery of the rear bracket, and a second cooling air passage for cooling air to flow into the hollow portion from the rear in the axial direction, then to cool a brush holder and a magnetic pole position detection sensor, and to be discharged through the ventilation holes by passing the inner periphery of the rear bracket.

First claim

What is claimed is:

1. A controller-integrated rotating electrical machine, comprising:
a stator and a rotor supported on a front bracket and a rear bracket
wherein:
the rotor has a field winding generating a magneto-motive force and a cooling fan and is supported in a rotatable manner on a rotation shaft supported on a front bearing provided to the front bracket and a rear bearing provided to the rear bracket;
a magnetic pole position detection sensor detecting a magnetic pole position of the rotating electrical machine and a brush holder having brushes that pass a current to the field winding are installed at a rear of the rear bearing in an axial direction of the rotation shaft;
an inverter device controlling and passing a stator current to an armature winding of the rotating electrical machine is mounted on an outer side of the rear bracket at the rear in the axial direction of the rotation shaft;
the inverter device includes switching elements passing the stator current, a heat sink cooling the switching elements, and a control board on which is mounted a control circuit that controls operations of the switching elements and the rotating electrical machine;
the inverter device is provided with a hollow portion in a center portion of the rotation shaft of the rotating electrical machine;
the rotating electrical machine has a first cooling air passage for cooling air generated by the cooling fan to flow in from an outer side in a radial direction of the rotating electrical machine, then to cool the heat sink, and to be discharged through ventilation holes provided to the rear bracket on an outer peripheral side by passing an inner periphery of the rear bracket, and a second cooling air passage for cooling air to flow into the hollow portion from the rear in the axial direction, then through the area immediately surrounding the brush holder and the magnetic pole position detection sensor so as to cool the brush holder and the magnetic pole position detection sensor, and to be discharged through the ventilation holes by passing the inner periphery of the rear bracket; and
the brushes and the magnetic pole position detection sensor are installed in such a manner that a sliding direction of the brushes and a direction in which terminals of the magnetic pole position detection sensor extend are aligned in substantially a same direction.

2. The controller-integrated rotating electrical machine according to claim 1 , wherein:
a control element controlling a current flown to the field winding is installed in such a manner that a longitudinal direction thereof is at a position offset to be substantially parallel with respect to the sliding direction of the brush and the direction in which the terminals of the magnetic pole position detection sensor extend.

3. The controller-integrated rotating electrical machine according to claim 1 , wherein:
a developed shape of the terminals of the magnetic pole position detection sensor is substantially a straight shape.

4. The controller-integrated rotating electrical machine according to claim 1 , wherein:
terminals including the terminals of the magnetic pole position detection sensor and connected to the control board are arranged substantially in line.

5. The controller-integrated rotating electrical machine according to claim 1 , wherein:
a brush plus terminal and a brush minus terminal of the brush holder are installed to one side of the brush holder.

6. The controller-integrated rotating electrical machine according to claim 1 , wherein:
one of a taper shape and a round shape is provided to the brush holder on an inlet side of the cooling air.

7. The controller-integrated rotating electrical machine according to claim 1 , wherein:
one of a taper shape and a round shape is provided to corners of the magnetic pole position detection sensor on an inlet side of the cooling air.

8. The controller-integrated rotating electrical machine according to claim 1 , wherein:
a high heat-releasing material having heat conductivity of 100 W/(m·K) or higher is used as a material of a brush plus terminal and a brush minus terminal of the brush holder.

9. The controller-integrated rotating electrical machine according to claim 1 , wherein:
a high heat-releasing material having heat conductivity of 20 W/(m·K) or higher is used as a resin material of the brush holder.

10. The controller-integrated rotating electrical machine according to claim 1 , wherein:
terminals of the magnetic pole position detection sensor are connected in a row in a reel shape by a connection portion in a manner dividable from the connection portion.

11. A controller-integrated rotating electrical machine, comprising:
a stator and a rotor supported on a front bracket and a rear bracket
wherein:
the rotor has a field winding generating a magneto-motive force and a cooling fan and is supported in a rotatable manner on a rotation shaft supported on a front bearing provided to the front bracket and a rear bearing provided to the rear bracket;
a magnetic pole position detection sensor detecting a magnetic pole position of the rotating electrical machine and a brush holder having brushes that pass a current to the field winding are installed at a rear of the rear bearing in an axial direction of the rotation shaft;
an inverter device controlling and passing a stator current to an armature winding of the rotating electrical machine is mounted on an outer side of the rear bracket at the rear in the axial direction of the rotation shaft;
the inverter device includes switching elements passing the stator current, a heat sink cooling the switching elements, and a control board on which is mounted a control circuit that controls operations of the switching elements and the rotating electrical machine;
the inverter device is provided with a hollow portion in a center portion of the rotation shaft of the rotating electrical machine;
the rotating electrical machine has a first cooling air passage for cooling air generated by the cooling fan to flow in from an outer side in a radial direction of the rotating electrical machine, then to cool the heat sink, and to be discharged through ventilation holes provided to the rear bracket on an outer peripheral side by passing an inner periphery of the rear bracket, and a second cooling air passage for cooling air to flow into the hollow portion from the rear in the axial direction, then to cool the brush holder and the magnetic pole position detection sensor, and to be discharged through the ventilation holes by passing the inner periphery of the rear bracket;
the brushes and the magnetic pole position detection sensor are installed in such a manner that a sliding direction of the brushes and a direction in which terminals of the magnetic pole position detection sensor extend are aligned in substantially a same direction; and
a control element controlling a current flown to the field winding is installed in such a manner that a longitudinal direction thereof is at a position offset to be substantially parallel with respect to the sliding direction of the brush and the direction in which the terminals of the magnetic pole position detection sensor extend.

12. A controller-integrated rotating electrical machine, comprising:
a stator and a rotor supported on a front bracket and a rear bracket
wherein:
the rotor has a field winding generating a magneto-motive force and a cooling fan and is supported in a rotatable manner on a rotation shaft supported on a front bearing provided to the front bracket and a rear bearing provided to the rear bracket;
a magnetic pole position detection sensor detecting a magnetic pole position

Assignees

• Mitsubishi Electric Corp

Inventors

• Shimano Tomoaki
• Fujita Masahiko

Classifications

• H01R39/38 Primary

  Brush holders · CPC title

• H02K11/05 Primary

  Rectifiers associated with casings, enclosures or brackets · CPC title

• H02K9/28

  Cooling of commutators, slip-rings or brushes e.g. by ventilating · CPC title

• H02K11/048 Primary

  Electricity · mapped topic